WO2022188658A1

WO2022188658A1 - Method and circuit for multiplexing usb interface, and electronic device and storage medium

Info

Publication number: WO2022188658A1
Application number: PCT/CN2022/078510
Authority: WO
Inventors: 常哲
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-03-09
Filing date: 2022-02-28
Publication date: 2022-09-15
Also published as: EP4261699A4; EP4261699A1; JP2024508592A; US20240078208A1; CN115048324A

Abstract

The embodiments of the present application relate to the technical field of communications, and provide a method and circuit for multiplexing a USB interface, and an electronic device and a storage medium. The method for multiplexing a USB interface comprises: acquiring at least one level signal, other than a service data signal and a ground signal, in a USB interface; according to a logical result of the at least one level signal and a predefined correlation, determining a target port of a target processor corresponding to the logical result as a transmission object of the USB interface, wherein the correlation comprises a logical result of the at least one level signal uniquely corresponding to each port of each processor; and transmitting received data to the transmission object by means of the USB interface, and sending data to be sent of the transmission object by means of the USB interface.

Description

Multiplexing method, circuit, electronic device and storage medium of USB interface

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with the application number "202110258065.6" and the filing date is March 9, 2021, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference. Application.

technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a multiplexing method, circuit, electronic device and storage medium of a USB interface.

Background technique

With the development of wireless terminal products, the integration of products has become stronger and stronger, and the functions have become more and more abundant, especially for data terminal products, in order to improve the performance and competitiveness of products, the processor in the terminal has been gradually upgraded from a single core. For multi-core, such as from a modem (modem) to a microcontroller unit (Microcontroller Unit, MCU) + modem, access point (Access Point, AP) + modem and so on. Each processor in the multiprocessor has its own function, and each processor has its own interface for debugging and data communication, such as Universal Serial Bus (Universal Serial Bus, USB) interface, Universal Asynchronous Receiver Transmitter (Universal Asynchronous Receiver/Transmitter, UART) interface and SPI serial peripheral interface (Serial Peripheral Interface, SPI), etc.

However, since there are multiple processors in the terminal, and each processor has its own processor interface for debugging and data communication, or, there is one processor in the terminal and the processor includes at least two processor interfaces, therefore, The terminal needs to set up multiple interfaces for the access of peripheral devices, and respectively transmit the data for debugging and communication to the port of the corresponding processor, so as to realize the debugging and data communication of the processor. Taking dual-processor products as an example, each processor has a port for debugging and communication, such as UART interface + USB interface. At this time, the terminal product should be designed with at least 4 interfaces for peripherals to connect to the processor port. Data for debugging and communication is transmitted, and the interface forms for peripheral access include standard USB interfaces, debugging connectors, test points, etc., which are relatively complex. In particular, some products need to design a debug board separately, and need to perform destructive operations such as disassembly during later debugging or troubleshooting, which makes some products need to design dual USB interfaces for peripheral access or sacrifice functions to design only a single USB interface. for peripheral access.

SUMMARY OF THE INVENTION

An embodiment of the present application provides a method for multiplexing a USB interface, where the electronic device to which the USB interface belongs includes multiple ports of a processor, or includes multiple processors, and each of the processors includes at least one The method includes: acquiring at least one level signal in the USB interface except the service data signal and the ground signal; The target port of the target processor corresponding to the result is used as the transmission object of the USB interface; wherein, the corresponding relationship includes the logical result of the at least one level signal uniquely corresponding to each port of each processor; through the USB interface The received data is transmitted to the transmission object, and the data to be sent of the transmission object is sent through the USB interface.

The embodiment of the present application also proposes a multiplexing circuit for a USB interface, including: a USB interface for transmitting signals; a decoder for acquiring at least one level of the USB interface except the service data signal and the ground signal signal; according to the logic result of the at least one level signal and the predefined correspondence, determine the target port of the target processor corresponding to the logic result as the transmission object of the USB interface; wherein, the correspondence includes The logical result of the at least one level signal uniquely corresponding to each port of each processor; a multi-way switch, used to select the transmission channel between the USB interface and the transmission object, so that the USB interface can The received data is transmitted to the transmission object, and the data to be sent of the transmission object is sent through the USB interface.

The embodiment of the present application also provides an electronic device, the device includes the above-mentioned multiplexing circuit of the USB interface.

An embodiment of the present application further provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the above-mentioned method for multiplexing a USB interface is implemented.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments.

1 is a flowchart of a method for multiplexing a USB interface provided by a first embodiment of the present application;

2 is a flowchart of a multiplexing method for a USB interface provided by a second embodiment of the present application;

3 is a flowchart of a method for multiplexing a USB interface provided by a third embodiment of the present application;

4 is a schematic structural diagram of a multiplexing circuit of a USB interface provided by a fourth embodiment of the present application;

FIG. 5 is an application schematic diagram 1 of the multiplexing circuit of the USB interface provided by the fourth embodiment of the present application shown in FIG. 4;

FIG. 6 is a second application schematic diagram of the multiplexing circuit of the USB interface provided by the fourth embodiment of the present application shown in FIG. 4;

FIG. 7 is a schematic structural diagram of an electronic device provided by a fifth embodiment of the present application.

Detailed ways

The main purpose of the embodiments of the present application is to propose a USB interface multiplexing method, circuit, electronic device and storage medium, aiming at realizing USB interface multiplexing in a multiprocessor terminal, so that no test points and debugging connectors are required. It uses only one standard USB interface to transmit data to different types of ports of multiple processors to realize functions such as data communication and debugging, which is very conducive to the simplified design and function expansion of product interfaces. And the later debugging and troubleshooting of the whole machine.

In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clear, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that, in each embodiment of the present application, many technical details are provided for the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be realized. The following divisions of the various embodiments are for the convenience of description, and should not constitute any limitation on the specific implementation of the present application, and the various embodiments may be combined with each other and referred to each other on the premise of not contradicting each other.

The first embodiment of the present application relates to a method for multiplexing a USB interface, which is applied in an electronic device to realize that a USB interface is multiplexed to multiple ports of a processor included in the electronic device, or multiple processors. Each port of the device transmits data, and the electronic devices here can be wireless terminal devices such as Tracker and CPE, as shown in Figure 1, including:

Step 101: Acquire at least one level signal in the USB interface except the service data signal and the ground signal.

Specifically, in the Universal Serial Bus (USB) interface, the pins USB_DP and the pins USB_DM are used to transmit service data, and the signals provided by the pins USB_DP and the pins USB_DM are called service data signals; GND is used for grounding, and the signal provided by the pin GND is a grounding signal. Since the service data signal and the ground signal in the USB interface cannot be adjusted at will during the communication process, only the signals other than the service data signal and the ground signal of the USB interface can be selected for subsequent selection of the processor port. That is, a level signal provided by at least one different pin of the USB interface except the pin USB_DP, the pin USB_DM and the pin GND is obtained.

More specifically, when the USB interface is a Micron USB interface, the signals provided by the USB interface include a service data signal, a ground signal, a USB_VBUS signal and a USB_ID signal. The level signal obtained at this time is the USB_VBUS signal and/or the USB_ID signal. When the USB interface is a Type-C USB interface, the signals provided by the USB interface include the signal for transmitting service data, the ground signal, the USB_VBUS signal, the SBU1 signal, the SBU2 signal, the CC1 signal, the CC2 signal and the USB_ID signal, etc., and the USB_VBIS signal is obtained. , SBU1 signal, SBU2 signal, CC1 signal, CC2 signal any signal or signal combination, such as acquiring CC1 signal, or acquiring CC1 signal and SBU2 signal, or acquiring CC1 signal, USB_VBIS signal and CC2 signal. Of course, the above is only a specific example, and in actual use, it may also include at least one signal other than the signal for transmitting service data and the ground signal in other types of USB interfaces, which will not be repeated here.

In one example, in order to meet the actual needs of the user, before step 101 is performed, the method further includes: setting the high and low level states of at least one level signal according to the requirements. At the same time, in order to set the level signal, a control switch can be designed to control the level state of the level signal in the USB port. Of course, the above is only a specific example, and the setting of the level signal in the actual use process can also be implemented in other ways, which will not be repeated here.

It should also be noted that the above description of the signals is named in terms of pins, for example, the CC2 signal is a signal provided by the CC2 pin of the USB interface.

Step 102, according to the logic result of at least one level signal and the predefined correspondence, determine the target port of the target processor corresponding to the logic result as the transmission object of the USB interface; wherein, the correspondence includes that each port of each processor is unique The logical result of the corresponding at least one level signal.

Specifically, the ports of the processor include a USB interface, a UART interface, an I2C interface, an SPI interface, and the like. Of course, the above is only a specific example. In actual use, the processor interface may also include other interfaces that can be transmitted by the USB interface after the transmitted service data is converted, which will not be repeated here.

In a specific example, the correspondence defines a one-to-one correspondence between each port of each processor and various possible logics of at least one level signal, for example: the logic of the USB1 port of processor 1 corresponding to the CC1 signal Represents 0, and the logical representation of the CC1 signal corresponding to the USB2 port of the processor 1 is 1. Assuming that the logical representation of the level signal of the CC1 signal obtained after step 101 is 0, the transmission object is uniquely determined to be the USB1 port of the processor 1 according to the corresponding relationship. ; When acquiring multi-channel level signals, the logical result refers to the logical combination result of multiple level signals, such as the logical combination 00 of the two-channel level signals corresponding to the USB port of the processor 1, and the universal asynchronous transceiver transmission of the processor 1 The logic combination 01 of the two-way level signal corresponding to the Universal Asynchronous Receiver/Transmitter (UART) interface and the logic combination 11 of the two-way level signal corresponding to the USB port of the processor 2, etc., assume that the step 101 is executed to obtain the two-way level signal signal and its logical combination result is 00, then according to the corresponding relationship, it is uniquely determined that the transmission object is the USB port of processor 1.

It should be noted that, in the corresponding relationship, the total number of ports of the processor is not greater than the total number of various possible logical results of at least one level signal.

In step 103, the received data is transmitted to the transmission object through the USB interface, and the data to be sent of the transmission object is sent through the USB interface.

Specifically, after the transmission object is determined in step 102, a data transmission path is established between the USB interface and the transmission object, and the peripheral device sequentially sends the data in the peripheral device to the USB interface, the data transmission path and the transmission object. In the target processor, the target processor then performs corresponding processing on the received data, and sends the processing result as the data to be sent to the peripheral through the transmission object, the data transmission path and the USB interface in turn.

Compared with the prior art, the embodiment proposed in the present application can obtain at least one level signal except the service data signal and the ground signal in the USB interface, and then can use the logical combination result of the at least one level signal, so that the The logical result of the at least one level signal and the logical result of the at least one level signal uniquely corresponding to each port of each processor, and a target port of a target processor is selected from the various ports of all processors as the USB interface Therefore, the received data can be transmitted to the transmission object through the USB interface, and the to-be-sent data of the transmission object can be transmitted through the USB interface. Since all processor ports in the terminal may be used as transmission objects, the one-to-one correspondence between the USB interface for peripheral access on the terminal and the processor port is destroyed, so that one USB interface can communicate with all processors in the terminal. Communication between various ports realizes the multiplexing of the USB interface in the multi-processor terminal, so as to achieve the realization of transferring data to multiple processor ports without the need of test points and debugging connectors using only one standard USB interface. The functions of data communication and debugging are very beneficial to the simplified design of product interface, function expansion, and the purpose of debugging and troubleshooting of the whole machine in the later stage.

The second embodiment of the present application relates to a method for multiplexing a USB interface. In this embodiment, before the received data is transmitted to the transmission object through the USB interface, and the to-be-sent data of the transmission object is sent through the USB interface , and also detects whether the transmission object adopts a two-wire serial bus, as shown in Figure 2, including:

Step 201: Acquire at least one level signal in the USB interface except the service data signal and the ground signal.

Specifically, step 201 in this embodiment is substantially the same as step 101 in the first embodiment, and details are not repeated here.

Step 202, according to the logical result of at least one level signal and the predefined correspondence, determine the target port of the target processor corresponding to the logical result as the transmission object of the USB interface; wherein, the correspondence includes that each port of each processor is unique The logical result of the corresponding at least one level signal.

Specifically, step 202 in this embodiment is substantially the same as step 102 in the first embodiment, and details are not repeated here.

Step 203 , detecting whether the transmission object adopts a two-wire serial bus, if yes, go to Step 204 , if not, go to Step 205 .

Specifically, the type of the interface indicates the form of the bus used by the interface. For example, the SPI interface adopts a four-wire serial bus, and the two-wire UART interface adopts a two-wire serial bus. Therefore, detecting whether the transmission object adopts a two-wire serial bus can be realized by detecting the interface type of the transmission object.

Step 204: Adjust the received data to a form that can be received by the transmission object, and adjust the data to be sent to a form that can be received by the USB interface.

Specifically, since the two-wire serial bus transmits 2 channels of data at a time, and the four-wire serial bus transmits 4 channels of data at a time, when data is transmitted between two interfaces using different types of serial buses When it is not possible to directly transfer from one interface to another interface, data processing is required to send and receive data between two interfaces using different types of serial buses normally. By adjusting the received data into a form that can be received by the transmission object, and adjusting the data to be sent into a form that can be received by the USB interface, when data transmission between interfaces using different types of serial buses is implemented, the sender's data is It is converted into data that the receiver can receive, so that the data can be transmitted normally.

In one example, in order to convert data stored in an interface using a certain type of serial bus into data that can be received by an interface using another type of serial bus, it can be achieved by introducing a bridge chip to process the stored data, such as , convert the data sent by the USB interface into a form that can be received by the SPI interface through the USB to SPI bridge chip.

In step 205, the received data is transmitted to the transmission object through the USB interface, and the data to be sent of the transmission object is sent through the USB interface.

Specifically, if the transmission object and the USB interface use different types of serial buses, the received and adjusted data is transmitted to the transmission object through the USB interface, and the adjusted data to be sent of the transmission object is sent through the USB interface . If the transmission object and the USB interface use the same type of serial bus, the received data is directly transmitted to the transmission object through the USB interface, and the to-be-sent data of the transmission object is directly sent through the USB interface.

Compared with the prior art, on the basis of realizing the beneficial effects brought by the first embodiment, the embodiment of the present application can detect whether direct communication is possible between the USB interface and the transmission object. Adjust the received data into a form that can be received by the transmission object, and adjust the data to be sent into a form that can be received by the USB interface, so that when data transmission is performed between interfaces using different types of serial buses, the sender's data is converted. It is the data that can be received by the receiver, so that the data can be transmitted normally, avoid data transmission errors caused by the mismatch between the USB interface and the transmission object, and improve the accuracy of data transmission.

The third embodiment of the present application relates to a method for multiplexing a USB interface. After the received data is transmitted to the transmission object through the USB interface, and the to-be-sent data of the transmission object is sent through the USB interface, the transmission can also be switched. Objects, as shown in Figure 3, include:

Step 301: Acquire at least one level signal in the USB interface except the service data signal and the ground signal.

Specifically, step 301 in this embodiment is substantially the same as step 101 in the first embodiment, and details are not repeated here.

Step 302: Determine the target port of the target processor corresponding to the logic result as the transmission object of the USB interface according to the logical result of at least one level signal and the predefined corresponding relationship; wherein, the corresponding relationship includes that each port of each processor is unique The logical result of the corresponding at least one level signal.

Specifically, step 302 in this embodiment is substantially the same as step 102 in the first embodiment, and details are not repeated here.

In step 303, the received data is transmitted to the transmission object through the USB interface, and the data to be sent of the transmission object is sent through the USB interface.

Specifically, step 303 in this embodiment is substantially the same as step 103 in the first embodiment, and details are not repeated here.

Step 304 , if it is detected that the high and low level states of the level signal change, re-execute the USB interface multiplexing method according to the changed level signal.

Specifically, because the high and low level states of the level signal uniquely determine the logical result of at least one level signal, and then uniquely determine the transmission object according to the corresponding relationship, once the high and low level states of the level signal change, that is, Indicates that the only identified transfer object has changed. The high and low level states of at least one level signal obtained in step 301 can be detected in real time or periodically, and when any level signal of at least one level signal changes, the USB interface multiplexing method is re-executed, Thereby, the transmission object is re-determined, and the switching of the transmission object is realized.

It should be noted that, when the user needs to switch the transmission object and keep the conditions such as electronic equipment and peripherals unchanged, it is only necessary to reset the high and low level states of the level signal obtained in step 301 according to their own needs and corresponding relationships, The debugging of the processor in the terminal and the switching of the communication port, or the switching between different processors, can be controlled by the multiplexing method of the USB interface provided in this embodiment, without the need to replace the USB interface, so that the USB port can be connected between each processor and the processor. The smooth switching between processor ports reduces the waste of resources such as manpower and time, and improves the efficiency of data transmission and debugging.

Compared with the prior art, the embodiment of the present application can re-execute the USB interface multiplexing method when any one of the at least one level signal changes on the basis of realizing the beneficial effects brought by the first embodiment. , so as to re-determine the transmission object and realize the switching of the transmission object. Further, the user can control the debugging of the processor in the terminal and the switching of the communication port, or switch between different processors by resetting the high and low level states of the level signal, without changing the USB interface, realizing the USB port. The smooth switching between processors and processor ports reduces the waste of resources such as manpower and time, and improves the efficiency of data transmission and debugging.

In addition, it should be understood that the division of steps of the various methods above is only for the purpose of describing clearly, and can be combined into one step or split into some steps during implementation, and decomposed into multiple steps, as long as the same logical relationship is included, all Within the protection scope of this patent; adding insignificant modifications to the algorithm or process or introducing insignificant designs, but not changing the core design of the algorithm and process are all within the protection scope of this patent.

The fourth embodiment of the present application relates to a multiplexing circuit of a USB interface, as shown in FIG. 4 , including:

The USB interface 401 is used to transmit signals.

The decoder 402 is used to obtain at least one level signal except the service data signal and the ground signal in the USB interface; according to the logic result of the at least one level signal and the predefined correspondence, determine the target corresponding to the logic result The target port of the processor is used as the transmission object of the USB interface; wherein, the corresponding relationship includes the logical result of at least one level signal uniquely corresponding to each port of each processor.

Specifically, when the USB interface 401 is a Micron USB interface, the pins of the USB interface include a pin USB_DP, a pin USB_DM, a USB_ID pin, a USB_VBUS pin and a USB_ID pin. Assuming that the electronic device to which the USB interface 401 belongs includes two processors and each processor includes two ports, and as shown in FIG. 5 , the processors are AP1 and AP2 respectively, and the ports of AP1 include the AP1 USB port and the AP1 UART port, The ports of the AP2 include the AP2 USB port and the AP2 UART port, and the decoder 402 can select a 2-4 decoder. At this time, the pins USB_DP, USB_DM and USB_ID in the USB interface are normally used, and the level signals provided by the USB_VBUS and USB_ID pins are used as the input of the decoder 402 (equivalent to at least one level signal). the logical result), and then the decoder 402 outputs a control signal after decoding to control the strobe state of the multiplexer 403, wherein, as shown in FIG. 5, the circuits where each switch of the multiplexer 403 is located are connected If different processor ports are connected, according to the connection relationship shown in Figure 5, the corresponding relationship represented by the logical combination result of at least one level signal uniquely corresponding to each port of each processor is shown in the following table:

After each time the decoder 402 obtains the USB_VBUS signal and the USB_ID signal provided by the USB_VBUS pin and the USB_ID pin as input, it can uniquely determine the AP1 USB port, the AP1 UART port, the AP2 USB port and the AP2 UART port according to the above table. A port is used as a transmission object. If the level signal of the USB_VBUS pin and the USB_ID pin input to the decoder 402 is 10, then the processor port is determined as the AP2 USB port according to the above table, and the control signal 2 is generated to control the multiplexer. Strobe SWITCH2 for data transfer.

Similarly, when the USB interface 401 is a Type-C USB interface, the pins of the USB interface include SBU1, SBU2, CC1, CC2, USB_DP, USB_DM, USB_ID, USB_VBUS pin and the USB_ID pin. Assume that the electronic device to which the USB interface 401 belongs includes two processors, and the total number of processor ports is 7, and as shown in FIG. 6 , the processors are AP1 and AP2 respectively, and the ports of AP1 include the AP1 USB1 port and the AP1 communication UART port , AP1 Debug_UART port, AP1 USB2 port and AP1 SPI port, AP2 ports include AP2 USB port, AP2 UART port, etc., the decoder 402 can choose 3-8 decoder. At this time, the pins USB_DP, USB_DM and USB_ID pins in the USB interface are normally used, and 3 pins are selected from the pins SBU1, SBU2, CC1, CC2 and USB_VBUS as The decoder 402 provides input signals, and the unselected pins remain in normal use. Here, the SBU1 pin, the SBU2 pin and the USB_VBUS pin are selected to provide input signals to the decoder 402 as an example for description. The level signal provided by the SBU1 pin, the SBU2 pin and the USB_VBUS pin is used as the input of the decoder 402 (equivalent to the logical result of at least one level signal), and then the decoder 402 outputs a control signal after decoding to control the gating state of the multiplexer 403, wherein, as shown in FIG. 6 , the circuits where each switch of the multiplexer 403 is located are connected to different processor ports respectively, then according to the connection relationship shown in FIG. The corresponding relationship represented by the logical combination result of at least one level signal corresponding to each port of the processor is as follows:

At this time, as shown in FIG. 6 , a Type-C USB cable or plug-in board is also provided for connecting switches or buttons, etc., so as to manually set the SBU1 pin, SBU2 pin and USB_VBUS pin in the USB interface 401 High and low state. Then each time the high and low level states of the SBU1 pin, the SBU2 pin and the USB_VBUS pin are set through the Type-C USB cable or the plug-in board, the decoder 402 obtains a corresponding input, and then according to the above table as shown in the table below. Among the ports of the seven processors shown in Figure 6, only one port is determined as the transmission object, such as switching the VBUS pin, SUB1 pin and SBU2 pin by controlling the switch of the encoder through a Type-C USB cable or a plug-in board The logic levels of all are 0, and the decoder 402 outputs the control signal 0 to control the multiplex switch to select the switch SWITCH0 corresponding to the AP1 USB1 port. The data communication between the interface 401 and the AP1USB1 port; or, through the Type-C USB cable or the plug-in board to control the switch of the encoder to switch the logic levels of the VBUS pin, the SUB1 pin and the SBU2 pin to be "110" in turn, the translation The encoder 402 outputs the control signal 6 to control the multiplexer to select the switch SWITCH6 corresponding to the AP2 UART port, and realize the data communication between the USB interface 401 and the AP2 UART port. At this time, the USB_VBUS power supply of the AP2 needs to be cut off, and so on.

Of course, the above is only a specific example. In the actual use process, the decoder 402 can also use other types of decoders and signals provided by other pins connected to the USB interface 401 as input, which is not done here. Repeat them one by one.

The multiplexer 403 is used to select the transmission channel between the USB interface and the transmission object, so that the USB interface transmits the received data to the transmission object, and sends the data to be sent of the transmission object through the USB interface.

Specifically, the multiplexer 403 also includes a data transmission path established between the USB interface and the transmission object. When communicating based on the reusable function of the USB interface 401, the data enters the USB interface 401 from the peripheral device, and after the decoder 402 determines the gate state of the multiplexer switch, the data in the USB interface 401 passes The switch 403 reaches the corresponding processor port, and finally enters the processor for processing. After the processor has processed the data, the processing results and the like are also sent to the peripheral device through the processor port, the multiplexer 403 and the USB interface 401 in sequence.

It is not difficult to find that this embodiment is an embodiment of the USB interface multiplexing circuit corresponding to the first embodiment, and this embodiment can be implemented in cooperation with the first embodiment. The related technical details mentioned in the first embodiment are still valid in this embodiment, and are not repeated here in order to reduce repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.

In addition, in order to highlight the innovative part of the present application, this embodiment does not introduce units that are not closely related to solving the technical problem raised by the present application, but this does not mean that there are no other units in this embodiment.

The fifth embodiment of the present application relates to an electronic device. As shown in FIG. 7 , the electronic device 701 includes a multiplexing circuit 702 of a USB interface. The multiplexing circuit 702 of the USB interface in this embodiment is roughly the same as that of the fourth embodiment. are the same, and will not be repeated here.

The sixth embodiment of the present application relates to a computer-readable storage medium storing a computer program. The above method embodiments are implemented when the computer program is executed by the processor.

That is, those skilled in the art can understand that all or part of the steps in the method for implementing the above embodiments can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium and includes several instructions to make a device ( It may be a single chip microcomputer, a chip, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

Those of ordinary skill in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the present application, and in practical applications, various changes in form and details can be made without departing from the spirit and the spirit of the present application. scope.

Claims

A multiplexing method for a USB interface, wherein the electronic device to which the USB interface belongs includes a plurality of processor ports; the method includes:

Obtain at least one level signal in the USB interface except the service data signal and the ground signal;

According to the logic result of the at least one level signal and the predefined correspondence, the target port of the target processor corresponding to the logic result is determined as the transmission object of the USB interface; wherein the correspondence includes each processing The logical result of the at least one level signal uniquely corresponding to each port of the device;

The received data is transmitted to the transmission object through the USB interface, and the to-be-sent data of the transmission object is sent through the USB interface.
The multiplexing method of a USB interface according to claim 1, wherein the USB interface is a Micron USB interface, and the level signal is a USB_VBUS signal or a USB_ID signal.
The multiplexing method of a USB interface according to claim 1 or 2, wherein the USB interface is a Type-C USB interface, and the level signal is a USB_VBUS signal, an SBU1 signal, an SBU2 signal, a CC1 signal or a CC2 signal.
The multiplexing method of a USB interface according to any one of claims 1 to 3, wherein the data received through the USB interface is transmitted to the transmission object, and the to-be-sent data of the transmission object is transmitted Before the data is sent through the USB interface, it also includes:

Detecting whether the transmission object adopts a two-wire serial bus;

If not, adjust the received data into a form receivable by the transmission object, and adjust the to-be-sent data into a form receivable by the USB interface.
The method for multiplexing a USB interface according to any one of claims 1 to 4, wherein before acquiring at least one level signal in the USB interface except the service data signal and the ground signal, the method further comprises:

The high and low level states of the at least one level signal are set.
The multiplexing method of a USB interface according to any one of claims 1 to 5, wherein, in the transmission of the received data through the USB interface to the transmission object, and the transmission object to be After the sending data is sent through the USB interface, it also includes:

If it is detected that the high and low level states of the at least one level signal change, the method for multiplexing the USB interface is re-executed according to the changed level signal.
The multiplexing method of a USB interface according to any one of claims 1 to 6, wherein the target port is a UART interface, an I2C interface or an SPI interface.
A multiplexing circuit of a USB interface, comprising:

USB interface for signal transmission;

The decoder is used to obtain at least one level signal in the USB interface except the service data signal and the ground signal; The target port of the target processor corresponding to the result is used as the transmission object of the USB interface; wherein, the corresponding relationship includes the logical result of the at least one level signal uniquely corresponding to each port of each processor;

a multiplexer, used for gating the transmission channel between the USB interface and the transmission object, so that the USB interface transmits the received data to the transmission object, and the to-be-sent data of the transmission object Data is sent through the USB interface.
An electronic device, comprising the multiplexing circuit of the USB interface as claimed in claim 8 .
A computer-readable storage medium storing a computer program, when the computer program is executed by a processor, the USB interface multiplexing method according to any one of claims 1 to 7 is implemented.